Telescopic joint for steam-pipes



{K0 Model.)

J. P. BURNHAM. TELESGOPIG JOINT FOR STEAM PIPES.

No. 555,509. Patnted Jan. 28, 1896.

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, UNITED .STA*1E S PATENT OFFICE.

, JOHN P. BURNHAM, or OAK rank, ILLINOIS;

'rzLssco lc Jom'r R STEAM-PIPES.

I srncmicscrrou forming part of Letters rmnt No. 553,509, dated January as, 1898.

Application filedjul 25,1895. Serial 1%. 557,127. Clo modeli) To all whom it may concern:

Befit known that I, JOHN P. BURNHAM, a citizenof the United States, residing at Oak Park, in the county of Cook and State of lllinois, have invented a new and useful Improvement in Expansion or Telescopic Joints for Steam-Pipes or other Pipes Containing Fluid under Pressure, of which the following is a specification.

My invention relates toirupro veinents in expansion or telescope joints for steam-pipes or other pipes containing fluids under pressure.

Ileretofore considerable difficulty has been experienced in the practical use of expansion or telescopic joints for steam-pipes owing to the tendency, especially in large pipes, of the steam-pressure to separate or force asunder the sections of the pipe at the telescopic joint, thus producing great strain upon the foundation or framework to which the separatesections are secured, and often occasioning seri ous injury.

The object of my invention is to provide an expansion or telescopic joint of a sin1ple,durable, and eflicient construction, that will be se1fbalanced, so that the pressure of the steam or other .fiuid in the pipe will not tend to force the sections asunder. To this end myinvention consists in providing the two telescopic sections or members of the joint each'with a flange, collar, or ring, formed integral therewith or secured thereto, and of substantially'the same area as the pipe, and together forming'in connection with the pipe-sections. a supplemental chamber which communicates with the interior of the pipe,

so that the steam pressure against these flanges, collars, or rings neutralizes-or counteracts that against the interior of the pipe at the ends thereof.

In the accompanying drawings, forming a part of this specification, and in which similar letters of reference indicate like parts, Figure 1 is a side elevation of a steam or other pipe containing a telescopic or 3 expansion joint embodying myinvention, and Fig. 2 is an enlarged central longitudinal section.

In the drawings, A represents a steam-pipe, and B D are the two members or sections of the telescopic or expansible joint uniting the sections A A of the pipe A, theone' pipesection or member fitting 'or, telescoping within the other. Theinner section or member, B,

is provided with an external flange, ring, or,

section D is also furnished at its end with an enlargement or bell (Z to adapt it'to surround the flange or collar 11 on the inner-section, B,

and thusform in connection therewith and the ring or collar-d a'supplemental annular Theouter steam-chamber E, the cross-sectional area of which equals, or should approximately equal, The supplemental steamthat of the pipe A. chamber E communicates with the interior of the pipe A through an opening 1) formed in] the section B.

F is the packing, inserted between section vB and the ring (1 secured to the section D, forthe purpose of making the joint steam-tight between the telescoping or sliding parts B D. F is the gland, adjustably secured to the ring (Z by threaded bolts f, so that the packin g F may be properly compressed.

The bell or enlargement d of the outer section or member, D, is made long enough to permit the necessary or desired movement be: tween the expansible or telescopic sections or members B D'of the joint. The flange, collar, or ring I) on the section B is provided, or preferably provided, at its periphery with a packing-ring b and a similar packing-ring b is also preferably provided at the end of section B. To prevent compression of the air in or vapor leaking into the chamber E", formed by the bell or enlargement d, I provide avent hole or openingd -through the bell (1 thus making this chamber E" open to the atmosphere at all'times.

As the end-thrust or pressure of the steam or other fluid in the pipe A against the section A D,-tendin g to separate it from the section A B, is counteracted or compensated for by the pressure of the steamin the supplemcntal chamber E against the ring or collar (1, which is of substantially equal area and which is secured to the section A D, and as the like end-thrust o'r'pressure againstthe section A B is in like manner compensated in the supplemental chamber E against the flange or collar b rigidly secured to the section 13 and of substantially equal area 'with the interior of the section A B,itis obvious that the telescopic or expansion joint will be;

self-balanced, and that the pressureg'of the steam or other fluid in the pipe will not tend to force asunder thetwo members of the joint I oj or at least will not exertany dangerous or injurious strain thereon.- Itis better to make the rings, flanges, or collars b' d secured to the opposing members B D of the joint substantially equal in area to the interior of the pipe '15 A or the sections B D thereof, so that .the

pressure will be perfectly balanced; but. it will be obvious to those skilled in the art that Y ing the pipe,.and its relativelysliding or telescopingiparts arelikewise preferably annular in form, as shown in the drawings; but it willbereadily understood by those skilled in the art that the principle of my invention is inthe supplemental chamber and of the sliding or telescopic parts forming its walls, the essential thing being that the supplemental chamber shall have a communication with the 4cv interior of the pipe, and that one of its slid- .ing or telescoping parts shall be secured to one section of the pipe and the other 'to the plthersection of the pipe,so that the pressure of e rate'the sections thereof will be counteractedby he pressureof the steam or fluid in the supplemental chamber tending to separate in be contrary direction the sliding or telescoping parts forming the walls of this supplemental chamber.

Iclaimi 1. The expansible or telescopic joint for steam or other pipes, consisting in the com- 'binati onyvith pipe section B; furnished with flange, collar or ringb, of pipe section D fur.-

nished with flange, collar or ring d, said. flanges, collars or rings 17 d, in connection with said pipe sections B D forming a supplementalsteam chamber E of substantially 6e equal area in cross section to said pipe sec tions, said pipe section B having an opening 1) connecting said supplemental steam cham-. her with the interi. r of the pipe section, a packing .F and a gland F, 65. specified. 1 r

2.- The expansible or telescopic joint for for or equalized byth'e pressure of the steam dependent of the particular form or shapeof.

steam or fluid in-the pipe tending to sepasubstantially as steam or other pipes, consist in the combination wi-th pipe section B,- urnishedwith flange, collar or' ring b, of pipe section D furo connecting said supplemental steam cham-' her with the interior of the pipe section, a packingF and1agland'F', said section D- having abell or enlargement d substantially as specified.

steam or other pipes, consisting in the com- '.bination with pipe section B, furnished with flange, collar or ring I), of pipe section D furnished with flange, collar or ring (1, said flanges, collars or'rings b d, in connection with said pipe sections B D forming a sup-- I plemental steam chamber E of substantially r 3. The expansibl or telescopic joint for 7 equal area in cross section to said pipe scctions, said pipe section B having an opening b connecting said supplemental steam chamher with the interior of the pipe section, a

packing F and a gland F, said section D having a bell or enlargement (P, the supplemental chamber E between said bell d and the inner pipe section D having a vent or opening through the same, substantially as specified.

4, The expansible or telescopic joint for steam or other pipes, consisting in the combination with pipe section B, furnished with flange, collar or ring I), of pipe section D furnished with flan'ge,co1lar or ring (1, said flanges, collars or rings b (1, in connection with said pipe. sections B D forming a supplemental steam chamber E of substantially equal area in cross section to said pipe sections, said pipe section B having an opening 5' connecting said supplemental steam chamher with the. interior of the pipe section, a. packing F and a gland F, said section D having'a bell or enlargement (1 said section B having a packing ring I) at the periphery of said flange or collar b and a packing ring 21 near the end of said section, substantially as specifiedu p 5. The expan'sible or telescoping joint for steam or other pipes, comprising in combination two telescopic sections or members, a

supplemental steam chamber communicating with the interior of the pipe, substantially equal in area in cross sectionto the pipe, and having'tworelatively sliding or telescoping parts, one secured to one section of the pipe and the other to the other section of the pipe, to'prevent the pressure of the fluid in the pipe from forcing the sections apart, substantially as specified.

Witnesses:

M. MUNDAY, J. RIoHAnDsom JOHN P. 'BURNHAM: 

